[R-sig-Geo] Selecting a raster cell which contains a point of given coordinates

Robert Hijmans r.hijmans at gmail.com
Fri Feb 18 18:29:44 CET 2011


> Hi all, 
> I have a raster file read by: 
> Map=readGDAL(paste("C:/Temperature/HDF/TERRA/TIF/Terra.",datesMOD11A1[d],".LST_Day_1km.tif",sep="")) 
> 
> and a point coordinates like: 
> 
> Gattia=matrix(c(x=13.66966,y=42.63941), ncol=2) 
> Gattia=project(Gattia,proj4string(Map)) 
> 
> I would like to know which is the cell in the Map that contains the 
> coordinates of the point named Gattia. 

Luca, you can do:

library(raster)
r <- raster(Map)
cellFromXY(r, Gattia)


Robert

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